Posted by Yukon58 on 1st Might 2023 I made a decision to go with this particular 16” upper for my Colt lessen once the fiasco Along with the atf pistol brace ruling. I wasn’t gonna fluff close to so I went all Colt and am happy I did.The best part is, You may use 9mm Publications in your pistol by buying a 9mm conversion kit so as to change it